CG Lab - Versionsgeschichte

Nathan: /* Welcome */

2025-11-18T14:10:38Z

Welcome

← Nächstältere Version		Version vom 18. November 2025, 16:10 Uhr
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	Hi there,		Hi there,

	'''This wiki is where we constantly collect resources relating to software, workflows and equipment in the CG Lab.'''. Inspired by Matt Estela's		'''This wiki is where we constantly collect resources relating to software, workflows and equipment in the CG Lab'''. Inspired by Matt Estela's
	one and only [https://tokeru.com/cgwiki/ CG Wiki] but more specific KHM media artists student oriented. The wiki is intended as a quick guide to where to find online resources related to KHM labs and computer graphics seminars.		one and only [https://tokeru.com/cgwiki/ CG Wiki] but more specific KHM media artists student oriented. The wiki is intended as a quick guide to where to find online resources related to KHM labs and computer graphics seminars.
	<br><br>		<br><br>

Nathan: /* Welcome */

2025-11-18T14:10:20Z

Welcome

← Nächstältere Version		Version vom 18. November 2025, 16:10 Uhr
Zeile 4:		Zeile 4:
	Hi there,		Hi there,

	'''This wiki is where we ~~will~~ collect resources ~~for~~ software, workflows and equipment in the CG Lab'''. Inspired by Matt Estela's		'''This wiki is where we constantly collect resources relating to software, workflows and equipment in the CG Lab.'''. Inspired by Matt Estela's
	one and only [https://tokeru.com/cgwiki/ CG Wiki] but more specific KHM media artists student oriented. The wiki is intended as a quick guide to where to find online resources related to KHM labs and computer graphics seminars.		one and only [https://tokeru.com/cgwiki/ CG Wiki] but more specific KHM media artists student oriented. The wiki is intended as a quick guide to where to find online resources related to KHM labs and computer graphics seminars.
	<br><br>		<br><br>

Nathan: /* Copernicus/COPs/Materials */

2025-11-18T14:08:25Z

Copernicus/COPs/Materials

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	*[https://www.youtube.com/watch?v=dn5zNrH_cFQ Solve visible seams problem in COPs: Houdini 20.5 - Rasterize attributes using VEX in COPs Rohan Dalvi]		*[https://www.youtube.com/watch?v=dn5zNrH_cFQ Solve visible seams problem in COPs: Houdini 20.5 - Rasterize attributes using VEX in COPs Rohan Dalvi]
	*[https://www.youtube.com/watch?v=9xZFu2XJTBA/ Terrain COPs Rohan Dalvi]		*[https://www.youtube.com/watch?v=9xZFu2XJTBA/ Terrain COPs by Rohan Dalvi]
	*[https://www.youtube.com/watch?v=hsQZD2CxwAE7 UDIMS in COPs]		*[https://www.youtube.com/watch?v=hsQZD2CxwAE7 UDIMS in COPs]

			*[https://www.youtube.com/watch?v=hayD5tw73EY/ Use Terrain flowmaps in Copernicus / Video Tutorial by Simon Houdini]

	* [https://www.youtube.com/watch?v=c1jupIDfQ_I Decals in Copernicus]		* [https://www.youtube.com/watch?v=c1jupIDfQ_I Decals in Copernicus]

Nathan: /* Copernicus/COPs/Materials */

2025-11-18T14:01:11Z

Copernicus/COPs/Materials

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	=====''' Copernicus/COPs/Materials'''=====		=====''' Copernicus/COPs/Materials'''=====

	'' !!! ~~Houdini 20.5 ships with Copernicus as BETA.~~ There may be some problems, especially on Macbooks, where the viewport does not update. Be aware of this! You can try restarting Houdini and/or going to Labs/Refresh Viewport. !!!''		'' !!! There may be some problems, especially on Macbooks, where the viewport does not update. Be aware of this! You can try restarting Houdini and/or going to Labs/Refresh Viewport. !!!''


	The Copernicus environment, also known as COP, is a 2D and 3D GPU image processing framework that enables real-time image manipulation within a 3D space. This framework consists of COP nodes, which provide a unique node body with a preview thumbnail, and can be wired together to control the flow of layer and geometry data. COP nodes fully interoperate with Surface Operators (SOPs), allowing seamless integration between 2D and 3D workflows, and can export results as images or volumes. The default image space ranges from -1 to 1, preserving the pixel aspect ratio, and texture space ranges from 0 to 1 across the data window and buffer space, useful for mapping textures. As of Houdini 20.5, Copernicus nodes are recommended instead of Compositing nodes, with the Compositing network now designated as COP Network - Old.		The Copernicus environment, also known as COP, is a 2D and 3D GPU image processing framework that enables real-time image manipulation within a 3D space. This framework consists of COP nodes, which provide a unique node body with a preview thumbnail, and can be wired together to control the flow of layer and geometry data. COP nodes fully interoperate with Surface Operators (SOPs), allowing seamless integration between 2D and 3D workflows, and can export results as images or volumes. The default image space ranges from -1 to 1, preserving the pixel aspect ratio, and texture space ranges from 0 to 1 across the data window and buffer space, useful for mapping textures. As of Houdini 20.5, Copernicus nodes are recommended instead of Compositing nodes, with the Compositing network now designated as COP Network - Old.

			*[https://www.youtube.com/watch?v=ZcXKWAUx2fE/ Axe Texturing: full breakdown of COPs texturing in Houdini / Video Tutorial by Simon Houdini]
	*[https://www.sidefx.com/tutorials/how-to-create-organic-textures/ How To Create Organic Textures / Video Tutorial Sidefx]		*[https://www.sidefx.com/tutorials/how-to-create-organic-textures/ How To Create Organic Textures / Video Tutorial Sidefx]
	*[https://www.sidefx.com/tutorials/how-to-create-tile-based-textures/ How To Create Tile Based Textures / Video Tutorial Sidefx]		*[https://www.sidefx.com/tutorials/how-to-create-tile-based-textures/ How To Create Tile Based Textures / Video Tutorial Sidefx]

Shuree: /* Terminology related to keyframe animation */

2025-09-30T14:09:14Z

Terminology related to keyframe animation

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	=====Terminology related to keyframe animation=====		=====Terminology related to keyframe animation=====
	*Interpolation (sometimes called tweening or easing) determines how values change between keyframes or sampled data points.		*Interpolation (sometimes called tweening or easing) determines how values change between keyframes or sampled data points.
	** Linear Interpolation (LERP)		** Linear Interpolation (LERP): Changes happen at a constant rate between keyframes. Produces steady motion but can feel mechanical or abrupt.
	~~***~~Changes happen at a constant rate between keyframes.		**Step (or Constant) Interpolation: The value jumps directly at the keyframe, with no transition in between. Useful for hold poses, sudden switches, or non-continuous data (like game states).
	~~***~~Produces steady motion but can feel mechanical or abrupt.		**Bezier / Spline Interpolation (e.g., Cubic, Hermite, Catmull–Rom, B-splines): Curved interpolation controlled by tangents or handles. Produces smooth, natural-looking animation. Most DCC tools (Blender, Maya, 3ds Max) use Bezier splines by default for keyframes.
	**Step (or Constant) Interpolation		**Ease In / Ease Out (Easing Curves): Specialized splines where motion gradually accelerates (ease in) or decelerates (ease out). Makes movement feel more organic and less robotic.
	~~***~~The value jumps directly at the keyframe, with no transition in between.		**Spherical Linear Interpolation (SLERP): Used for rotations represented by quaternions. Ensures smooth rotation without distortions or gimbal lock. Very common in games and mocap retargeting.
	~~***~~Useful for hold poses, sudden switches, or non-continuous data (like game states).		**Extrapolation: How motion continues beyond the first/last keyframe (constant, linear, cyclic)
	**Bezier / Spline Interpolation (e.g., Cubic, Hermite, Catmull–Rom, B-splines)
	~~***~~Curved interpolation controlled by tangents or handles.
	~~***~~Produces smooth, natural-looking animation.
	~~***~~Most DCC tools (Blender, Maya, 3ds Max) use Bezier splines by default for keyframes.
	**Ease In / Ease Out (Easing Curves)
	~~***~~Specialized splines where motion gradually accelerates (ease in) or decelerates (ease out).
	~~***~~Makes movement feel more organic and less robotic.
	**Spherical Linear Interpolation (SLERP)
	~~***~~Used for rotations represented by quaternions.
	~~***~~Ensures smooth rotation without distortions or gimbal lock.
	~~***~~Very common in games and mocap retargeting.
	**Extrapolation
	~~***~~How motion continues beyond the first/last keyframe (constant, linear, cyclic)

	==== Procedural Animation ====		==== Procedural Animation ====

Shuree: /* Procedural Animation */

2025-09-30T14:02:10Z

Procedural Animation

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	==== Procedural Animation ====		==== Procedural Animation ====
	Procedural animation is based on algorithms and rules, rather than pre-defined keyframes. For example, Houdini has a fully procedural system that uses a node-based workflow. Instead of keyframing manually along the timeline, in Houdini, you can use [https://exmediawiki.khm.de/index.php?title=CG_Lab#VEX VEX] expressions or use noise to animate procedurally. Similarly, you can also create procedural animation using Geometry Nodes inside Blender.		Procedural animation is based on algorithms and rules, rather than pre-defined keyframes. For example, Houdini has a fully procedural system that uses a node-based workflow. Instead of keyframing manually along the timeline, in Houdini, you can use [https://exmediawiki.khm.de/index.php?title=CG_Lab#VEX VEX] expressions or use noise to animate procedurally. Similarly, you can also create procedural animation using Geometry Nodes inside Blender.
			* [https://www.youtube.com/watch?v=Uoi5hil_N08\| Houdini Procedural Walker with VEX]
			* [https://www.youtube.com/watch?v=NqdnTXuxn6k\| Procedural Animations Using The SOP Solver]
			* [https://www.youtube.com/watch?v=pf3pLSTCmf4\| Procedural Animation with Geometry Nodes in Blender]
			* [https://www.youtube.com/@argonautcode\| Extra: Procedural animation explained by a programmer]

	==== Animating with Motion Capture ====		==== Animating with Motion Capture ====
	==== Animating with other tools ====		==== Animating with other tools ====

Shuree: /* Procedural Animation */

2025-09-30T13:50:08Z

Procedural Animation

← Nächstältere Version		Version vom 30. September 2025, 15:50 Uhr
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	==== Procedural Animation ====		==== Procedural Animation ====
	Procedural animation is based on algorithms and rules, rather than pre-defined keyframes.		Procedural animation is based on algorithms and rules, rather than pre-defined keyframes. For example, Houdini has a fully procedural system that uses a node-based workflow. Instead of keyframing manually along the timeline, in Houdini, you can use [https://exmediawiki.khm.de/index.php?title=CG_Lab#VEX VEX] expressions or use noise to animate procedurally. Similarly, you can also create procedural animation using Geometry Nodes inside Blender.

	==== Animating with Motion Capture ====		==== Animating with Motion Capture ====
	==== Animating with other tools ====		==== Animating with other tools ====

Shuree: /* 3D Animation */

2025-09-30T13:18:16Z

3D Animation

← Nächstältere Version		Version vom 30. September 2025, 15:18 Uhr
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	==== Procedural Animation ====		==== Procedural Animation ====
			Procedural animation is based on algorithms and rules, rather than pre-defined keyframes.
	==== Animating with Motion Capture ====		==== Animating with Motion Capture ====
	==== Animating with other tools ====		==== Animating with other tools ====

Shuree am 30. September 2025 um 13:14 Uhr

2025-09-30T13:14:00Z

← Nächstältere Version		Version vom 30. September 2025, 15:14 Uhr
Zeile 451:		Zeile 451:

	In 2022 glTF 2.0 was released as the ISO/IEC 12113:2022 International standard, recognizing glTF's global position as a 3D asset format."		In 2022 glTF 2.0 was released as the ISO/IEC 12113:2022 International standard, recognizing glTF's global position as a 3D asset format."
			<br>
			<br>
			<br>
			=== '''3D Animation''' ===
			==== Keyframe Animation ====
			A Keyframe is simply a marker of time that stores the value of a property.<ref>[https://docs.blender.org/manual/en/latest/animation/keyframes/introduction.html]</ref> Keyframing is the recording of a parameter’s value at a specific moment in time, advancing the time, then recording the value again.<ref>[https://help.autodesk.com/view/MOBPRO/2025/ENU/?guid=GUID-7E4641AA-9D59-4DB5-9A19-19D2D1A83718]</ref> Animation consists of frames, a series of drawings, renderings, or photos that, when played back at high speed, are interpreted by the human eye as continuous movement. The concept is the same as that of filmed movies, where individual images on a film strip are played back at high speed to create the illusion of motion.<ref>[https://www.unrealengine.com/en-US/explainers/animation/how-to-do-keyframe-animation-in-unreal-engine]</ref>
			=====Terminology related to keyframe animation=====
			*Interpolation (sometimes called tweening or easing) determines how values change between keyframes or sampled data points.
			** Linear Interpolation (LERP)
			***Changes happen at a constant rate between keyframes.
			***Produces steady motion but can feel mechanical or abrupt.
			**Step (or Constant) Interpolation
			***The value jumps directly at the keyframe, with no transition in between.
			***Useful for hold poses, sudden switches, or non-continuous data (like game states).
			**Bezier / Spline Interpolation (e.g., Cubic, Hermite, Catmull–Rom, B-splines)
			***Curved interpolation controlled by tangents or handles.
			***Produces smooth, natural-looking animation.
			***Most DCC tools (Blender, Maya, 3ds Max) use Bezier splines by default for keyframes.
			**Ease In / Ease Out (Easing Curves)
			***Specialized splines where motion gradually accelerates (ease in) or decelerates (ease out).
			***Makes movement feel more organic and less robotic.
			**Spherical Linear Interpolation (SLERP)
			***Used for rotations represented by quaternions.
			***Ensures smooth rotation without distortions or gimbal lock.
			***Very common in games and mocap retargeting.
			**Extrapolation
			***How motion continues beyond the first/last keyframe (constant, linear, cyclic)

			==== Procedural Animation ====
			==== Animating with Motion Capture ====
			==== Animating with other tools ====

Shuree: /* 3D Scanning */

2025-09-30T11:46:31Z

3D Scanning

← Nächstältere Version		Version vom 30. September 2025, 13:46 Uhr
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	===='''Equipment for Scanning:'''====		===='''Equipment for Scanning:'''====
	*Laserscanner for large areas, architecture etc.: Leica BLK360 G1		* Laserscanner for large areas, architecture, etc.: Leica BLK360 G1
			** For a general introduction to Leica, Cyclone FIELD 360 app, and creating 3D mesh or Pointcloud, go to [[Introduction to Leica BLK-360 G1]]
	* Handheld scanner for very detailed replicas of smaller objects: [https://www.artec3d.com/de/portable-3d-scanners/artec-eva Artec Eva]		* Handheld scanner for very detailed replicas of smaller objects: [https://www.artec3d.com/de/portable-3d-scanners/artec-eva Artec Eva]
	*Scanning with a Phone/Iphone/Ipad		*Scanning with a Phone/Iphone/Ipad
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	** [https://dev.epicgames.com/community/learning/courses/1Xd/unreal-engine-capturing-reality-community-highlight-reality-capture-tutorials/dB34/capturing-reality-realitycapture-making-3d-models-with-your-smartphone RealityCapture: Making 3D Models with your smartphone]		** [https://dev.epicgames.com/community/learning/courses/1Xd/unreal-engine-capturing-reality-community-highlight-reality-capture-tutorials/dB34/capturing-reality-realitycapture-making-3d-models-with-your-smartphone RealityCapture: Making 3D Models with your smartphone]
	** [https://dev.epicgames.com/community/learning/tutorials/EPrj/capturing-reality-realityscan-turntable Short introduction for using turntable ]		** [https://dev.epicgames.com/community/learning/tutorials/EPrj/capturing-reality-realityscan-turntable Short introduction for using turntable ]
	*Reality Capture		*Reality Capture/Scan
	** A software (among other software that can do the same) that can turn images and videos it uses the frames as images into 3D models by calculating different perspectives. Also possible to mix with laser scanned data and improve your models measurements or the other way around, improve your laser scans texture by adding some higher res images. Only runs on Windows machines not Mac(All PCs at the lab have the most current version installed).		** A software (among other software that can do the same) that can turn images and videos it uses the frames as images into 3D models by calculating different perspectives. Also possible to mix with laser scanned data and improve your models measurements or the other way around, improve your laser scans texture by adding some higher res images. Only runs on Windows machines not Mac(All PCs at the lab have the most current version installed).
	*** [https://www.capturingreality.com/sample-datasets Example Files and Datasets for testing]		*** [https://www.capturingreality.com/sample-datasets Example Files and Datasets for testing]